Pfizer said it will expand its Kalamazoo, Mich., manufacturing facility to increase production of its COVID-19 drug Paxlovid (nirmatrelvir, ritonavir).

The Kalamazoo site also produces the company’s COVID-19 vaccine, along with more than 100 other products.

The 1,300-acre site produces 1,200 metric tons of active pharmaceutical ingredients and ships 140 million units of drugs annually.

Pfizer said it will announce more details about its facility expansion plans in early June, including the project’s cost and timeline.